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If Xwayland gets to realize a window meant for composition before the compositor redirected windows (i.e. redirect mode is not RedirectDrawManual yet), the window would stay "invisible" as we wouldn't create a wl_surface/wl_shell_surface for it at any later point. This scenario may happen if the wayland compositor sets up a X11 socket upfront, but waits to raise Xwayland until there are X11 clients. In this case the first data on the socket is the client's, the compositor can hardly beat that in order to redirect subwindows before the client realizes a Window. In order to jump across this hurdle, allow the late creation of a matching (shell) surface for the WindowPtr on SetWindowPixmapProc, so it is ensured to be created after the compositor set up redirection. Signed-off-by: Carlos Garnacho <carlosg@gnome.org> Reviewed-by: Michel Dänzer <mdaenzer@redhat.com> Reviewed-by: Olivier Fourdan <ofourdan@redhat.com> (cherry picked from commit 78cc8b6f)
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